Locomotive cylinder cock



Nov. 28, 1933. A. 1 BRICE 1,936,581

LOCOMOTIVE CYLINDER COCK Filed Aug. 20, 1930 3 SheetS-Shee'b l INVENTOR.

VW ATTORNEY NOV. 28, A. BRlCE LOCOMOTIVE CYLINDER COCK Filed Aug. 20, 1950 3 Sheets-Sheet 2 m IJMHHH NNUU I INVENTOR. w \7l/zw` @M65/ckv, BY 6 n ATToR EY.

w w KN m llhllhl Filed Aug. 20, 1930 3 Sheets-Sheet 3 Patented Nov. 28, 1933 UNETD STATS LCOMOTIVE CYLXNDER CGC/K Albert L. Brice, Frederick,

assigner to The Application August 20, i936. Serial No. 476,585

l2 Claims.

My invention relates broadly to automatic drain cocks for locomotive cylinders, and more particularly to a pneumatic actuating means for cylinder drain cooks.

One or the objects of my invention is to provide a construction ci automatic cylinder drain cock having a minimum number oi parts whiciA may be manufactured and assembled inexnei l sively on a quantity production basis at sn t cost.

Another object of my invention is to provide a construction oi automatic cylinder drain cock having means for insuring the operation of the drain cock either pneumatically or without pneumatic operating means in the event that the pneumatic operating means may fail in service.

Still another object oi invention is to provide an arrangement of pneumatic means for actuating locomotive cylinder cocks including a combined reciproca-tory piston and a ball valve device having wearing qualities oi relatively long life.

A further object of my invention is to provide a construction of pneumaticaily operated drain cock having a minimum number of parts, which are subject to wearing friction thereby insuring long life to the cylinder drain cock.

A still further object or my invention is to provide a cylinder drain cock including a combination ball valve reciprocatory piston valve having a minimum number of parte with minimum friction whereby the piston valve is shifted in one direction and the ball valve shifted in a direction normal to the movement of the piston valve.

`Other and further objects or" my invention reside in the construction of cylinder drain cock as set forth more fully in the specification heren inafter following by reference to the accompanying drawings, in which:

Figure 1 is a diagrammatic and schematic view showing the arrangement of the cylinder cock or" my invention and the pneumatic open' (Cl. 12l-134) oi cylinder drain cock. -leretofore, considerable difficulty has been encountered in constructing a simplified form for cylinder drain cocks, for cylinder drain cocks have been relatively com-A plicated in their construction and have involved a considerable number of independent parts. T

These parte are subject to wear and must be re'- newed from time to time, rendering the inspection of the drain cock relatively expensive in time and labor or personnel.` The cylinder drain cock of my invention has been designed with a minimum number of parts and with means for avoiding destruction of parts by wearing .friction. employ a combined reciprooatory valve and a ball valve arrangement assembled in such manner as to avoid any kconsiderable amount of wear.

The cylinder cock of my invention is designed to be actuated by a pneumatic control system, but in the event of failure of the air line, the

cylinder cock may be operated Vby plugging the air line and redirecting the passage of `condensation or steam through the-.valve. I provide a plug member which is normally carried within the valve structure for directing the passageV of steam` through onel part of the valve, while dirooting theV passage oi the control air throughl another portion thereof. However, in the event of breakage of the airline, the plug member may be removed from its position within the valve and utilized to close the air tap when the air f line is removed from the cylinder cock.. The parts of the valve of my invention may all be manufactured inexpensively and assembled in a manner subject to ready removal.

Referring more particularly to the drawings,

reference character l designates` an engine cylinder which is provided with tapped connections at opposite ends thereof screw threaded as Yrepresented at 3 to receive the screw threaded end 4 of the cylinder cock construction of my invention. The engine cylinderwhich has been diagrammatically illustrated includes the reciprocatory piston 2. IThe cylinder cock of my inven-y tion isapplied to opposite ends of the cylinder as shown. The iiuid pressure 'or air control line is 105]' represented generally at 34 leading through tap connections 3l into the screw threaded sleeve or ierrule 30 which extends into the side wall of the cyliider cock 5. The air control line connects through pipe 35 to the manually controlled 110- valve shown as including a casing 38 into which the air line 37 extends and from which the control line or pipe 36 extends to the connection 35. A valve 39 is carried by the valve stem 38 and is operated by control handle 40. Discharge pipe 41 may be connected or disconnected from the air control line 36 for effecting operation of the cylinder cocks. In the position illustrated the pressure from the air line 37 passes around the seat of valve 39 and through pipe connection 36 to the pipe line 35 and through connections 3 to tap connections 31 for supplying air under pressure to the cylinder cock 5 Lin each instance through the screw threaded sleeve or ferrule 30. When it is desired to remove the pressure from the air control line, valve 40 is retracted thus raising valve 39 and stem 38 and allowing discharge of air pressure from air control line 36 through discharge pipe 41 at the saine time cutting off the air supply through pipe line 37. The cylinder cock 5 comprises a housing which includes an oir-center interior cylinder 20 having a wall 18 which is apertured by a port 22 in one side thereof. The cylinder cock is ported centrally at 24. The central port interconnects with the side port 21 terminating in the aperture 22 in the side of wall 18. The end of the cylinder cock is closed by a screw threaded member 7 having tool engaging faces 8 and an upwardly externally screw threaded portion 6 which is adapted to engage'internal screw threads on the end of the cylinder cock housing. The screw threaded member 7 has an annular seat 9 at the upper extremity thereof, which seat is adapted to cooperate with the edge lla of the movable piston member 11 which is housed within the cylinder 20. The piston 11 is provided with a central recess 13 in the upper end thereof and a side recess 17 adapted to register with the port 22 in wall 18. The recess 17 is connected with a passage 14 which extends through the movable piston 11. An annular valve seat 15 is fitted in piston 11 as shown and is bevelled at 15a to provide a seat for the ball valve 16. The piston 11 is tted with sealing rings indicated at 12 in the upper end thereof so that pressure established in cylinder 20 above the recess 13 in piston 11 tends to shift the position of piston 11 as will be more fully hereinafter explained. The lower extremity of the housing 5 is provided with an annular recess 19 as shown. One side of the exterior of the cylinder cock 5 is apertured and screw threaded to secure the screw plug 23 through which the ball valve 16 may be inserted or removed. 'Ihe cylinder cock has a laterally extending partition member 42 adjacent the upper end thereof above which there is disposed the chamber 25 and passage 32. Passage 32 permits the passage of steam from the central port 24 through port 43 to the cylinder 20 in the event that screw threaded plug 27 is not engaged in the screw threads 26 inthe passage 32. When the screw threaded plug 27 is engaged in the screw threads 26, the steam passage from the central port 24 to the area over the piston 11 is closed. Under normal operating conditions the screw threaded ferrule or sleeve 30 which lis screw threaded at 29 engages the internal screw threads 28 in the upper portion of the cylinder cock for conveying air under pressure through the chamber 25 and port 43 to the area 20 immediately above piston 11 and in the recess13 thereof.

Figure 1 shows the normal arrangement of the cylinder cocks where air is supplied under C Qntrol of the manually operated valve 40..

Figure 2 shows a normal operating condition where air has been supplied under pressure through tap 31, chamber 25, port 43, to the area 20 above recess 13 in piston l1, as a result of which piston 11 is forced downwardly to a position where the annular edge 11d seats against the annular seat 9 and provides a tight seal therewith. The air pressure has been designated in Fig. 2 by vertically extending lines. The steam pressure or condensate has been represented by horizontal lines filling the passage 24 and interconnecting passage 21 thus forcing ball Valve 16 against its seat 15. When the pressure in the main cylinder falls to atmospheric or less, that is when the throttle valve is closed, the drain occurs around the ball valve 16, through recess 17, through the seat 15, and through the passage 14 and outwardly through the discharge port 10. To effect continued draining, it is only necessary to release the air pressure, as a result of which the condition shown in Fig. 4 will be obtained. Air piston l1 is shifted vertically removing the edge .lia from sealing contact with the edge 9 and allowing the continued draining of the engine cylinder.

In the event that the air line is destroyed or air pressure may fail, I may still secure dependable operation of the cylinder cock by removing the screw threaded plug 27'from interiorly screw threaded port 26 and replacing the plug in the end of the screw threaded ferrule or sleeve 30 as shown at 27a. It is now possible for the steam to take a course through the chamber port 43, and into the area 2() and in back of the recess 13 for moving piston l1 to the position as shown in Figure 5. Ball valve 16 seals the discharge port against the leakage of steam pressure under the condition shown in Figure 5 and yet draining will aperiodically occur when the pressure in the main cylinder falls to atmospheric or less, that is when the throttle valve is closed. v

In order that the valve may be usable regardless of the condition of the air control line, I form the plug 27 of such size that whenremoved from the internal screw threads 26, it may be replaced in the screw threaded ferrule or sleeve 30 for closing the chamber 25 as shown.

While I have described the cylinder cock of my invention in one of its preferred embodiments, I desire that it be understood that modifications may be made and that no limitations upon my invention are intended other than are imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

l. A cylinder cock comprising a body connected to a cylinder and formed with a vertically disposed chamber, a reciprocatory piston within said chamber, a drain passage extending longitudinal- 1y in said body from the upper end thereof and having its lower end opening into a side of said chamber near the lower end thereof, a removable seat at the lower end of said body formed with a discharge port and serving to limit the travel of said piston, a passage formed through said piston and having its ends registering with the discharge port and lower end of the drain passagechamber, means for connecting the dra-in passage with an engine cylinder, a passage for establish-- ing communication between the drain passageY and the upper end of said chamber, a reciprocatory piston disposed in said chamber and controlled according to the application of pressure through the last mentioned passage, a passage formed through said piston having its 4upper end registering with the lower end of the drain passage, a removable seat connected with said body and adapted to limit movement of said piston, a discharge port formed centrally of said seat and registering with the lower end of the passage formed through said piston, andan auxiliary valve carried by said piston and adapted to open and close the passage through the piston for providing a drain path between the discharge port in the seat and the drain passage in said body.

3. A cylinder cock comprising a body adapted to be connected with an engine cylinder, said body including a drain passage and a cylindrical chamber having its lower portion communicating with the drain passage, a reciprocatory piston operative in said chamber, a passage formed through said piston and having its upper end registering with the drain passage, an auxiliary valve disposed in the passage olfsaid piston, a fluid passage extending through said body and communicating with the upper end of said chamber, a removable seat at the lower end of said body adapted to limit the movement ofl said piston, a discharge port formed in said seat and registering with the lower end or the passage formed in the piston, the auxiliary valve carried by said piston operating to open or close the path through the drain passage and the passage through said piston and through said discharge port.

4. A cylinder cock comprising a body connectible with one end of an engine cylinder, a

drain passage extending through said body, a cylindrical chamber in said body having a side port near its lower end communicating with the lower end of the drain passage, a discharge port at the lower end of said body opening into said cylinder chamber, a piston valve in said chamber formed with a passage having its lower end registering with the discharge port and its upper end portion extending transversely and registering with the side port, a iuid passage extending through said body andcommunicating with the upper end of said chamber, and a valve disposed within said piston and operating in the passage therein, said piston and valve operating in directions normal one to the other for controlling discharge of condensate through said discharge port.

5. A cylinder cock comprising a body having its upper end connectible with one end of an 3. engine cylinder, a drain passage extending through said body from its upper end, a cylindrical chamber extending longitudinally of said body and having a side port near its lower end communicating with the lower end of the drain u passage, a discharge port at the lower end of said body opening into said cylindrical chamber, a piston valve reciprocatory within said chamber, a fluid passage extending through said body and communicating with the upper end oi said chamber, a passage extending through said piston valve and having its lower end registering with the discharge port and its upper end regis` tering with the side port, and a valve disposed within the passage of said piston valve and operating in the path of said passages, said valves operating in axial directions rdisposed transversely of each other in the path of the passages for controlling the discharge of condensate through said discharge port.

6. A cylinder cock comprising a body connectible with one end of an engine cylinder, a drain passage extending through said body, a cylindrical chamber extending longitudinally of said body and formed with a side port near its lower end communicating with the lower end of the drain passage, a discharge port at the lower end of said body opening into said cylindrical chamber, a piston valve mounted to reciprocate within said chamber, a uid passage extending through said body and communicating with the upper end of said chamber, a passage extending through said piston valve changing from a direction coincident with the longitudinal axis of the piston toa direction transversely thereof and having its lower end registering with the discharge port and its upper end registering with the side port, a valve within the passage of said piston valve, said valvesoperating in different directions in the path of said passages for controlling the discharge of condensate through said discharge port.

7. A cylinder cool;` comprising a casting adapted to engage the end of an engine cylinder, a

two way passage formed in said casting, a cylindrical chamber in said casting connected at its upper end with one portion oi the two way pas-y sage and having a side port at its lower end communicating with the lower' end of the other por# tion of the two way passage, removable'means for closing the path between the two way passage and the upper end oi said chamber, separate means for supplying fluid under pressure to the upper end of said chamber, a piston Vvalve in;

said chamber formed with a passage, a seat at the lower end of said chamber to limit movement of the piston valve formed witha discharge port, the passage through the piston valve having its ends registering with the discharge port and side port of the chamber, and an auxiliary valve within the passage of the piston valve, each' valve operating to control the discharge of condensate from the lower end of the two way passage through the discharge port under control of uid pressure introduced into said chamber.

8. A cylinder cock. comprising a casting adapted to be screwed into an engine cylinder, a drain passage extending through said casting, a vertically disposed cylindrical chamber in saidl casting at one side oi said drain passage having a side port near its lower end communicating with the lower end of the drain passage, a piston valve in said chamber formed with a passage leading from its lower end to its side, a fluid passage extending through said casting and communicating with the upper end of said chamber, a valve seat carried by the lower end of said casting for limiting movement of said piston valve and formed with a discharge port, the passage through the piston valve having its ends registering with the discharge port and side port of the chamber, a ball valve carried by the piston valve within the passage formed therein, both of said valves operating to control .the discharge of condensate from the drain passage through the discharge port in the valve seat.

9. A cylinder drain cock comprising a casting adapted to be screwed into an engine cylinder, a

drain passage extending through said casting, a

communicating with the lower end of the drain passage, a piston valve in said chamber and formed with a passage, a valve seat carried by the end of said casting for limiting movement of said piston valve and formed with a discharge port, the passage formed in the piston valve having its ends registering with the discharge port and side port of the chamber, a ball valve in the passage formed in the piston valve, both of said valves operating to control discharge of condensate through the discharge port in the valve seat, means for supplying air pressure to the upper endof the cylindrical chamber' for holding the piston valve against the valve seat at the lower end of the chamber, and means for block* ing the supply of air pressure and introducing 'steam pressure from said drain passage into the upper end of the chamber.

10. A cylinder drain cock comprising a casting adapted to be screwed into an engine cylinder, a drain passage extending through said casting, a vertically disposed cylindrical chamber in said casting having aside port near its lower end opening intothe lower end of the drain passage, a piston valve operative in said chamber and formed with a passage leading from its bottom and opening through a side, a valve seat carried by the lower end of the casting for Ylimiting movement of said piston valve and formed with a discharge port, the passage through the piston Valve having its ends registering with the discharge port and side port of said chamber, a ball valve carried by said piston valve within the passage formed therein, both of said valves operating to control the discharge of condensate from said drain passage through the discharge port in said valve seat, a port interconnecting the upper portion of said drain passage with the upper end of said cylindrical chamber, means for introducing air under pressure into said cylindrical cham'- ber for actuating said piston valve while blocking the port to said drain passage, and means for cutting off the supply of air and opening the port to said drain passage for controlling said piston valve by steam pressure.

11. A cylinder drain cock comprising a casting adapted to be screwed into an engine cylinder, a vertically disposed cylindrical chamber in said casting, a drain passage extending through said casting and opening into said cylindrical chamber, a piston valve operative in said chamber and formed with a passage extending angularly through the same with one end registering with upper extremity of said drain passage with the upper portion of said cylindrical chamber, said port being screw threaded to receive a removable plug, and a pipe line for supplying air pressure to said cylindrical chamber when said removable plug is engaged within said port, said removable plug being adapted to close the connection between said pipe line and said cylindrical chamber when disengaged from said port, whereby said piston valve is actuated by steam pressure.

12. A cylinder drain cock comprising a casting adapted to be screwed into an engine cylinder, a vertically disposed cylindrical chamber in said casting, a vdrain passage extending though said casting and opening into said cylindrical chamber, a piston valve operative in said cylindrical chamber, a passage extending through said piston valve, a valve seat carried by the'end ofA said casting for limiting the movement of said piston valve and formed with a discharge port, the passage in the piston valve having its ends registering with the drain passage and discharge port, a ball valve carried by said piston valve within the passage in said piston valve, both of said valves operating to control the discharge of condensate from said drain passage through the discharge port in said valve seat, a port interconnecting the upper portion of said drain pas'- sage with the upper portion of said cylindrical chamber, said port being screw threaded to receive a removable plug, a screw threaded bushing extending into said casting in alignment with said port, said screw threaded bushing being adapted to alternately engage the end of a fluid pressure control line or to engage said removable plug when said plug is removed from said screw threaded port, whereby said piston valve may be actuated under fluid pressure control directed through said drain passage or through said fluid pressure control line.

' ALBERT L. BRICE.

JLU 

